OpenFGA vs Auth0: Which Should You Choose in 2026?
Choosing between OpenFGA and Auth0 comes down to understanding what each tool does best. This comparison breaks down the key differences so you can make an informed decision based on your specific needs, not marketing claims.
By Toolradar Team · Last updated February 28, 2026 · Methodology
Short on time? Here's the quick answer
We've tested both tools. Here's who should pick what:
OpenFGA
Fine-grained authorization inspired by Google's Zanzibar, built for scalability and flexibility.
Best for you if:
- • You need something completely free
- • You need identity & access features specifically
- • Implements fine-grained authorization inspired by Google's Zanzibar.
- • Supports ReBAC, RBAC, and ABAC with a flexible modeling language.
Auth0
Identity platform for developers
Best for you if:
- • You want the higher-rated option (8.8/10 vs 0.0/10)
- • You need api tools features specifically
- • Industry-leading identity platform
- • Authentication and authorization as a service
| At a Glance |  OpenFGA |  Auth0 |
|---|---|---|
Price | Free | Free + Paid |
Best For | Identity & Access | API Tools |
Rating | —/100 | 88/100 |
| Feature | OpenFGA | Auth0 |
|---|---|---|
| Pricing Model | Free | Freemium |
| Editorial Score | — | 88 |
| Community Rating | No ratings yet | No ratings yet |
| Total Reviews | 0 | 0 |
| Community Upvotes | 0 | 0 |
| Categories | Identity & Access | API ToolsIdentity & Access |
How OpenFGA and Auth0 Compare
OpenFGA
Fine-grained authorization inspired by Google's Zanzibar, built for scalability and flexibility.
Free
Auth0
Identity platform for developers
Free tier available · 88/100 score
OpenFGA is a identity & access tool. Auth0 is in api tools.
Who Should Use What?
On a budget?
OpenFGA is free. Auth0 is freemium.
Go with: OpenFGA
Want the highest-rated option?
Auth0 scores 88/100. OpenFGA is unrated.
Go with: Auth0
Value user reviews?
Neither has user reviews yet.
Go with: Auth0
3 Questions to Help You Decide
What's your budget?
OpenFGA is free. Auth0 is freemium. Go with OpenFGA if free matters most.
What's your use case?
OpenFGA is a identity & access tool. Auth0 is in api tools. Pick the category that matches your needs.
How important are ratings?
Not all tools have been rated yet.
Key Takeaways
Auth0
- Higher score: 88/100 vs unrated
- Free tier available
- Our pick for this comparison
OpenFGA
- Completely free
- Better fit for identity & access
The Bottom Line
Auth0 (88/100) is our pick. That said, OpenFGA is free — hard to beat on price.
Frequently Asked Questions
Is OpenFGA or Auth0 better?
Auth0 scores 88/100 in our evaluation. OpenFGA is free and Auth0 is freemium.
What are OpenFGA and Auth0 used for?
OpenFGA: Fine-grained authorization inspired by Google's Zanzibar, built for scalability and flexibility.. Auth0: Identity platform for developers.
What does OpenFGA cost vs Auth0?
OpenFGA is completely free. Auth0 is freemium (free tier + paid plans). Visit their websites for detailed pricing.